It's a complicated question with no single definitive answer, as it heavily depends on the specific point in the Dragon Ball timeline and the circumstances of the fight.
Power Levels and Potential
Gohan possesses far greater potential and raw power than Krillin. Even as a child, Gohan demonstrated immense hidden strength, often surpassing even Goku's power in moments of intense emotion. As he grows older, especially during the Cell Saga where he achieves Super Saiyan 2, his power dwarfs Krillin's.
However, Gohan's training consistency fluctuates. There are periods where he focuses more on his scholarly pursuits than martial arts, leading to a decrease in his fighting prowess. Krillin, on the other hand, consistently trains and refines his techniques.
Krillin's Advantages: Experience and Strategy
Despite the power gap, Krillin is a seasoned and strategic fighter. He's resourceful and has developed techniques to compensate for his relative lack of power.
- Experience: Krillin has decades of fighting experience, having trained alongside Goku under Master Roshi and facing numerous formidable opponents.
- Techniques: Krillin developed unique techniques, such as the Destructo Disc (Kienzan), which can cut through incredibly durable opponents, and the Solar Flare, which can momentarily blind enemies. As noted in the reference, his Solar Flare x100 is a particularly potent version.
- Battle Intelligence: He is intelligent and adapts quickly to different combat situations.
Hypothetical Scenarios: Determining the Outcome
To determine who would win, consider these scenarios:
- Early Dragon Ball Z (Saiyan Saga): Gohan, while possessing latent power, is still a child and relatively inexperienced. Krillin likely wins due to his greater control and fighting skills.
- Cell Saga (Super Saiyan 2 Gohan): Gohan would overwhelmingly defeat Krillin. The power difference is simply too vast.
- Peaceful Years (Post-Buu Saga, pre-Tournament of Power): Gohan's power is significantly diminished due to lack of training. Depending on how much Gohan has slacked off, Krillin might be able to win if he utilizes his techniques strategically, particularly the Solar Flare to create openings for attacks.
- Tournament of Power Arc: Gohan has regained a significant amount of his power. While still not at his peak from the Cell Saga, he is far stronger than Krillin and would win.
Conclusion
Ultimately, Gohan would likely win in most scenarios due to his vastly superior potential and Saiyan heritage. However, Krillin's experience, strategic thinking, and unique techniques give him a chance, especially if Gohan's training has lapsed. It is NOT a guaranteed win for either character. Krillin's chances are very small.